55222142 has 4 divisors (see below), whose sum is σ = 82833216. Its totient is φ = 27611070.

The previous prime is 55222127. The next prime is 55222147. The reversal of 55222142 is 24122255.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55222147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13805534 + ... + 13805537.

It is an arithmetic number, because the mean of its divisors is an integer number (20708304).

Almost surely, 2^55222142 is an apocalyptic number.

55222142 is a deficient number, since it is larger than the sum of its proper divisors (27611074).

55222142 is a wasteful number, since it uses less digits than its factorization.

55222142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27611073.

The product of its digits is 1600, while the sum is 23.

The square root of 55222142 is about 7431.1602055130. The cubic root of 55222142 is about 380.8065555609.

Adding to 55222142 its reverse (24122255), we get a palindrome (79344397).

The spelling of 55222142 in words is "fifty-five million, two hundred twenty-two thousand, one hundred forty-two".